72 replies to this topic

[fixitsan]

have you any pics of the gearbox wire your disconecting fixitsan? i havnt seen this mod before but gona give it a try while im having a sorting of my bike this winter.

 

 

this is the top of the ignitor unit, behind the front left side panel.....the white wire has been released from the plug rear side  and tucked up into the harness sleeve for safety (more permanent taping up  will be done)

 

 

 ignitor1.jpg   399.86KB   1 downloads

 

 

 

 

 

To release the pin play around with the sprung retainer holding the plated terminal in the socket (yellow arrow)

 

 

 ignitor2.jpg   119.96KB   1 downloads

Edited by fixitsan, 15 November 2016 - 07:49 pm.

[tdmpaul]

cheers i'll give it a go :-)

[fixitsan]

Still got the 1st and 2nd gear wires sending to the ICU from the selector barrel?

 

 

While waiting for a new output shaft seal I've looked at the neutral switch some more. I removed the one off my spare 850 engine to compare and it would appear that the wires are actually for gears 2&3, and not 1&2 as previously thought.

 

I thought something was strange about that because after disconnecting the white wire at the ignitor I was getting noticeably better performance in 3rd gear

[TYREDNGRUMPEE]

While waiting for a new output shaft seal I've looked at the neutral switch some more.

 
Got a photo?
Just saying, as I've got a problem with this and I have no spare engine or time to dismantle my Mk2.
Also, having referenced JBX's site, looked at the 4TX photo diagrams (1N4001 diodes) and compared them to what I saw on my motorcycle, IIRC I noticed that

• The 2/3 wires weren't shown as "common" at the ICU end (which was odd) in JBX's example
• I thought it seemed strange that 1st gear should be left "open" with only 2nd and 3rd receiving attention
• IIRC, that my confusion arose from having discovered that my own wiring was wired around the neutral terminal to 1st and 2nd gear terminals, which fitted my own mindset. So what was going on?

IIRC, we all came to the view that there were a couple of minor, anomalous errors (how we all laughed)

 

I worked around with the assumption that the 1-N-2 scenario was the correct position to take, did the diode thang, kept the wiring to the ICU end intact and it all worked fine thanks

 

evidenced below

 

A video showing Mk2 gear indicator functioning perfectly well

 

and a Mk2 that pulls like crazy without any mods

Edited by TYREDNGRUMPEE, 27 November 2016 - 10:46 am.

[fixitsan]

You'll see it when you pull the switch out....the worn copper pads from the switch contact tell you which ones have been used, and the 1st gear contact pad is definitely empty....not sure how to show this on a photo because I can't photograph both sides at the same time, but I'll see what I can do

[Favs]

Mirror?

[TYREDNGRUMPEE]

You'll see it when you pull the switch out....the worn copper pads from the switch contact tell you which ones have been used, and the 1st gear contact pad is definitely empty....not sure how to show this on a photo because I can't photograph both sides at the same time, but I'll see what I can do

 

What?

Surely the internal wear, described by the ball bearing on the internal surface, would visit all the contacts, whether or not they're plumbed into the electrics.

 

All contacts shown present and correct here for a 4TX engine

This is what I have worked with and your description is not reflecting my reality.

My reality is that the 1-N-2 contacts were connected in my case.

 

I'll use that earlier link to the video as proof of having been down in that area and having already done the head scratching (with a positive outcome to boot)

 

partial screen grab from JBX's site

http://www.jbx9.16mb.com/

 

You will also see from the above picture, that the 3-4-5-6 contacts are spaced out with a washer each, whereas the 1-N-2 connectors are not.

Is this because they don't normally carry eye connectors and need to be there to prevent the screws from bottoming out inside the brass fittings? 

 

Later JBX goes on to show (like you, yourself state) that N-2-3 are plumbed in, BUT, IIRC, we did arrive at some other conclusion that I cannot recall and am not in the position to make a definitive call on.

All I have is my common sense and experience to guide me and the background feeling that someone conceded that a diagram had been oversimplified and a error introduced as a consequence. 

 

another partial screen grab from JBX's site

http://www.jbx9.16mb.com/

 

Apologies to JBX if I am misrepresenting him and thanks for the guidance that helped me do this

Edited by TYREDNGRUMPEE, 27 November 2016 - 12:02 pm.

[fixitsan]

The bottom pic looks identical to my wiring.....1st gear not connected

[TYREDNGRUMPEE]

The bottom pic looks identical to my wiring.....1st gear not connected

 

Photo please.

I'll check when the chain and sprockets come due in about 6K time.

 

It also begs the following questions

Given that his system is very rudimentary. 1-N-2-3-4-5

If, in fact 1st gear mode is isolated from being identified by the ignition system, how is it that 1st gear mode is treated the same as 4th and 5th gear modes?

Why don't we notice? Does it really matter?

Why are 2nd and 3rd gears special?

Edited by TYREDNGRUMPEE, 27 November 2016 - 12:41 pm.

[fixitsan]

The switch fitted to my bike

 

 

 

 

 

 

 

My spare switch

 

 

 

 

 

Colour code  - light blue = N, white = 2, Green/white = 3

 

 

 

Edited by fixitsan, 07 January 2017 - 06:23 pm.

[Studley Ramrod]

I'm confused, are we talking 850 or 900 switch thingy ?

[fixitsan]

I'm confused, are we talking 850 or 900 switch thingy ?

It's an 850 titled thread. Are you suggesting i would ever tolerate topic drift ? .......

[Studley Ramrod]

Not at all.   It's the neutral plus 6 contacts, suggesting 6 gears, that threw me.

[fixitsan]

Not at all.   It's the neutral plus 6 contacts, suggesting 6 gears, that threw me.

 

 

You and  me too. ! 

[drewpy]

 

 

evidenced below

 

A video showing Mk2 gear indicator functioning perfectly well

 

and a Mk2 that pulls like crazy without any mods

who did that mod, really neat and tidy.

 

Have a link?

[TYREDNGRUMPEE]

If I compare this to the switch panel shown on JBX's site, I see that your contacts 1-4-5-6 are missing their washers + blanking screws.

My panel was identical to JBX's example and had blanking screws in every hole. eh? What gives sez i?

So that suggests that someone has already been here!?

Therefore inconclusive, raising more questions. Sure you're not channeling wigwamclan?

 

[fixitsan]

Sure you're not channeling wigwamclan?

 

 

Absolutely not, I'm a married man !

[TYREDNGRUMPEE]

Have a link?

 

JBX's site

http://www.jbx9.16mb.com/

 

You will have to register

Look under "Electrical > Gearbox Indicator".

[fixitsan]

 

So that suggests that someone has already been here!?

Therefore inconclusive,

 

 

I'ld say conclusive that yours is the odd one out !

[TYREDNGRUMPEE]

Look what I found! 

 

http://www.carpe-tdm...=29672&p=293431

 

 

Installed a gear indicator in the rev counter. Looked at JBX's site. One thing to note, it's 1st & 2nd connected on the gear position sensor not 2nd & 3rd.

 

This is the back story.

RolfieB followed JBX's instructions and fitted a gear indicator.

He had loads of bits left over and offered them to me.

Within two weeks I had done the conversion myself.

 

We both found and agreed that gears 1 & 2 were connected and NOT 2 & 3.

We were both on the alert.

RolfieB had a Mk2a and I had a Mk2.

There was no room for confusion.

Edited by TYREDNGRUMPEE, 27 November 2016 - 08:30 pm.